When we feel depressed we can feel no interest or pleasure, have feelings of guilt or low self-worth, hopelessness, disturbed sleep or appetite, low energy, poor concentration, and find that we don't enjoy the things that we used to. Depression is different from feeling down or sad, which can be a short-lived mood. It is usually longer lasting and we come to believe that there is no way to lift ourselves out of the depths of despair, but there are ways.
Depression can often be triggered by some kind of loss – may be from very early in life where the memory of the causing event(s) is sketchy, or it may be connected to adult life, for instance, a relationship has ended, you have lost a loved one, been made redundant or similar, but sometimes it just seems to come out of nowhere, with no logical explanation. Wherever it comes from, however long you have felt like this, it doesn't have to stay with you.
Being with someone who can acknowledge and help you explore the reasons for these feelings will help you to find a way out. I will be with you as you process your feelings; there is nothing you can say to me that is more than I can bear.